Polyester 100% LIGHT BLOCKING TECHNOLOGY: Certified to block all light; great for daytime sleeping, children's room or nursery INNOVATIVE WRAPAROUND DESIGN: Blocks all side light, too DAMASK PATTERN: Update your room decor with this classic damask pattern on linen-blend textured fabric ENERGY SAVING: Keeps room cooler in summer and warmer in winter, Includes side fasteners to improve efficiency ONE PANEL PER PACKAGE: Use one panel for window widths up to 33 inches; we recommend using two panels for a standard window opening of 34 to 66 inches, and additional panels for larger openings EASY CARE: Panel is machine washable